Fantasy Tip: O'Brien is a big-time power prospect who has transitioned from catcher to the outfield. He hit 26 homers in the minors in 2015 and is a waiver wire target for home runs in the short term in deep mixed and NL-only leagues. His stay could be short, though, with David Peralta returning from the DL soon. Bracho has potential to be a successful late-inning reliever, but he's a watch list guy for now. Collmenter is likely to serve in a long-relief role despite the D-backs having a need for starters at the moment. He can be ignored in fantasy.

Fantasy Tip: Well, thus far, Collmenter has shown anything but positive signs, as he's put together a disastrous 10.57 ERA and 2.22 WHIP in his three rehab starts. And Hale's strategy with the former opening day starter should also apply to fantasy owners: Don't even think about picking him up until he shows some life in the majors again, which still might take awhile.